What is the meaning of this quote?
''To kill time, a committee meeting is the perfect weapon'' -Unknown

The meaning of this is that committee meetings are a wonderful way to waste time. The anonymous person is saying that these meetings take up way more time than they should. This reflects a common attitude that holds that committee meetings are very inefficient.

The common view of committee meetings is that they take too long to make decisions because everyone talks too much. Everyone who is there feels like they have to give input on everything to prove that they are valuable members of the committee. Instead of having one person make decisions quickly, you have a large number of people talking and arguing and finally (hopefully) making the same decision that would have been made by the single person.

This is what the quote is saying--that committee meetings are a waste of time.